dont know if anyone can help me or not.i have v3 arcade installed on my site and it works great.i am however trying to change my site theme.when i change the theme i can no longer accesss the sracde.the blocks are there but when i click on the arcade or a game i cant access it.any ideas guys.

Your new theme probably doesnt have arcade files with it, it is safe enough to copy over files like the following from one theme to another.

arcade_body.tpl
arcade_cat_body.tpl
games_body.tpl
gamespopup_body.tpl
gamespopup_finish.tpl
scoreboard_body.tpl
statarcade_body.tpl

I think thats all ?

Please clarify your Nuke and phpbb version
I was successfully modify one theme for arcade

here
http://game.thaihealth.net
(thai lang but have a link to chnge language)
I think mods should be on both
forums/template/subsilver (or yourtemplate)
themes/forums/

-whoisplaying body.tpl
-toparcade body.tpl
-statarcade body.tpl
-scoreboard body.tpl
headingarcade body.tpl
hall of fame.tpl
games body.tpl
comments select body.tpl
comments new body.tpl
comments list body.tpl
comments body.tpl
arcade cat body.tpl
acade body.tpl